Construction and Mechanism Research of Metallo Platinum(ІІ) Supramolecular Chiral Assemblies Driven by Multivalent Interactions

• 1、CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Hefei 230026

Abstract：platinum(II) acetylide units with distinct substituent alkyl groups are served as building block to achieve a series of continuous platinum(II) acetylide supramolecular assemblies via the efficient coupling of amidic hydrogen bonds and π-π stacking interaction due to the cooperative and additional effect between multivalent interactions during self-assembling process. Test methods of concentration-depended 1H NMR, temperature-depended UV-vis and CD experiments, on the one hand, demonstrate that the efficient cooperation of amidic hydrogen bonds and π-π stacking interaction could drive platinum(II) acetylide monomers to self-assemble into one-dimensional helical supramolecular polymers. On the other hand, compared with previously reported literatures, the conclusions reveal that regulating the relative position and cooperative effect between multivalent interactions could influence self-assemble process of monomer molecules. Moreover, self-assembling ability of monomer molecules could also be impacted by steric hindrance caused by its own substituent alkyl group. Larger substituent alkyl group could limit intermolecular regular arrangement, which is unfavourable for self-assembly.

Keywords： supramolecular assemblies multivalent interactions platinum(II) acetylide unit molecular tweezer self-assembly